3 mile visibility, made with aircraft grade aluminium, LEDs can last for 50 000+ hours, constant on/off, waterproof, uses one 18650 battery or two disposable CR123 3 volt batteries (rechargeable CR123 can never be trusted to start off in the normal 3 volt range so only use disposables!).

Individually tested by Greg McGee and shipped from Denver, Colorado for quick overnight to two day delivery (when priority mail is chosen as shipping method).